var cbTerms = true;
function enableDisableBtnSubmit(btn){
    var myButtonSubmit = document.getElementById(btn);

    
    if(cbTerms == true){
        myButtonSubmit.disabled = false;
        document.getElementById('imgWarningTerms').style.display = 'none';
        cbTerms = false;

    }else if(cbTerms == false){
        myButtonSubmit.disabled = true;
        document.getElementById('imgWarningTerms').style.display = 'inline';
        cbTerms = true;
    }

}